Oven device

Abstract

To provide an oven device capable of simply and efficiently cooking even under a condition in which fuel is limited.SOLUTION: In an oven device 20, a fire hole 33 functioning as an intake port is penetratedly opened on a front surface of a cylindrical oven body 21 with a bottom that becomes a combustion chamber 32 burning a fuel 60, and an iron pot 50 can be disposed on an upper side of the combustion chamber, The oven body has an upper end portion 42 though which an iron pot bottom 51 of the iron pot enter the body on an upper part of the combustion chamber. The upper edge portion has an exhaust port upper edges expanding a clearance S2 with a peripheral surface of the iron pot on a rear surface side of the oven body. An exhaust port 44 is formed between the exhaust port upper edge and the peripheral surface of the iron pod. Immediately under the exhaust port, an exhaust passage 45 communicating to the exhaust port is formed by a peripheral wall 41 of the oven body and the peripheral surface of the iron pot.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a stove apparatus that can be used to cook rice or other cooking during emergencies or camping. [Background technology]

[0002] A stove apparatus is known as a cooking tool that can heat and cook food during disasters, camping, etc. (See, for example, Patent Document 1.) A stove apparatus generally uses firewood or charcoal as fuel.

[0003] In the event of a disaster, local governments and other organizations stockpile a certain amount of food, such as emergency rations, as a disaster prevention measure. However, due to restrictions on storage space and costs, the amount of food that can be stockpiled is limited, and preparations to secure food at a self-help level are also recommended. For example, ordinary households often stockpile rice and other foods, which can be used as self-help food in the event of a disaster. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Publication number 2-9281 Summary of the Invention [Problem to be solved by the invention]

[0005] However, rice is a food ingredient that needs to be cooked, so how to cook it becomes an issue when it is difficult to obtain high-quality firewood or charcoal as fuel during a disaster.

[0006] On the other hand, firewood and charcoal can be ignited relatively easily if you have an ignition agent, but to ignite them without an ignition agent requires skill in starting a fire. Also, it takes time for firewood and charcoal to become a stable heat source.

[0007] Even outside of disaster situations, such as when camping, there may be situations where there is food but a shortage of good quality firewood or charcoal for fuel, and it is also possible that people may be unable to get a fire started properly due to lack of familiarity with fire-making skills.

[0008] An object of the present invention is to provide a stove apparatus that can easily and efficiently cook food even in a situation where fuel is limited. [Means for solving the problem]

[0009] The stove device according to the present invention is A furnace device in which a fire opening, which also serves as an air intake, is opened through the front of a bottomed cylindrical furnace body that serves as a combustion chamber for burning fuel, and a kettle can be placed above the combustion chamber, The stove body is The upper portion of the combustion chamber has an upper edge portion through which the bottom of the kettle can enter the furnace body, The upper edge portion has an exhaust port upper edge where the rear side of the furnace body has a wider gap with the peripheral surface of the kettle, and an exhaust port is formed between the exhaust port upper edge and the peripheral surface of the kettle, Directly below the exhaust port, an exhaust passage is formed by the peripheral wall of the stove body and the peripheral wall of the kettle, which communicates with the exhaust port.

[0010] The upper edge portion of the stove body and the kettle are circular in plan view, the diameter of the kettle is smaller than that of the upper edge portion, and the kettle can be positioned eccentrically toward the front side.

[0011] The upper edge of the exhaust port may have a branch wall extending toward the kettle and dividing the exhaust port into left and right portions.

[0012] The stove body may be configured so that the upper edge on the rear side bulges outward.

[0013] The upper edge portion is elliptical in plan view, The combustion chamber may be eccentrically disposed toward the front.

[0014] Two or more fire openings can be opened side by side on the left and right sides of the front surface of the stove body.

[0015] It is desirable that the furnace body have a necking portion in which the inner surface of the combustion chamber narrows toward the upper edge portion.

[0016] The bottom of the kettle can be positioned so that 1 / 3 to 2 / 3 of the total height of the kettle enters the furnace body.

[0017] It is desirable that the hook body be provided with a support for holding the hook at a position higher than the upper edge.

[0018] It is desirable that the fire opening be opened below the bottom of the kettle in which it is placed.

[0019] The stove body can be provided with a grate that floats fuel from the bottom surface.

[0020] It is desirable that the grate has a suppression wall that prevents fuel charged from the fire opening from moving rearward.

[0021] In addition, the cooking utensil of the present invention is The kettle is placed in the stove device. Effect of the Invention

[0022] According to the stove device of the present invention, the heat generated in the combustion chamber heats the bottom of the kettle and is stored above the fire opening, heating the fire opening side of the kettle. In addition, the exhaust heat that flows along the bottom of the kettle, through the exhaust passage, and toward the exhaust opening also heats the exhaust opening side of the kettle. This makes it difficult for heat to escape from the stove body, allowing it to be transferred to the kettle with high efficiency. In addition, the exhaust from the exhaust opening ensures the air flow from the fire opening that is necessary for fuel combustion, so the fuel does not go out and can burn stably.

[0023] Therefore, even with relatively easy-to-obtain poor fuels such as newspapers and waste paper, it is possible to cook delicious rice, cook other dishes, boil water, etc. Newspapers and waste paper can be easily ignited without ignition agents, and do not require high skill to start a fire. Compared to stockpiling fuels such as firewood and charcoal, newspapers and waste paper are stockpiled to a certain extent in each household, so local governments can reduce the cost of stockpiling fuel in anticipation of a disaster. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is a perspective view of a stove-top cooking utensil according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing a state in which the pot is separated from the stove device of the stove cooking tool. [Diagram 3] FIG. 3 is a right side view of the kamado cooking utensil. [Figure 4] FIG. 4 is a front view of the kamado cooking utensil. [Diagram 5] FIG. 5 is a plan view of the stove device. [Figure 6] FIG. 6 is a cross-sectional view of the kamado cooking utensil taken along line AA in FIG. [Figure 7] FIG. 7 is an explanatory diagram showing the flow of air and heat inside a furnace during combustion. [Figure 8] FIG. 8 is a perspective view of a stove-top cooking utensil according to a second embodiment of the present invention, as viewed obliquely from the front. [Figure 9] FIG. 9 is a perspective view of the kamado cooking utensil as seen from the right side. [Figure 10] FIG. 10 is an exploded view of a kamado cooking utensil. [Figure 11] FIG. 11 is a plan view of a kamado cooking utensil. [Figure 12] FIG. 12 is a cross-sectional view taken along line 12-12 of FIG. [Figure 13] FIG. 13 is a cross-sectional view taken along line 13-13 of FIG. [Figure 14] FIG. 14 is a cross-sectional view taken along line 14-14 of FIG. [Figure 15]FIG. 15 is a cross-sectional view taken along line 15-15 of FIG. [Figure 16] FIG. 16 is a cross-sectional view of a kamado cooking utensil taken through the fire opening and the center of the kettle, showing fuel burning inside the kamado body. [Figure 17] Figure 17 is a photograph showing the state in which re-burning began when the kettle was removed while the fuel was in contact with the bottom of the kettle and had not yet burned out. [Figure 18] FIG. 18 is a perspective view showing the storage state in which the kettle and the support are stored in the stove body. [Figure 19] FIG. 19 is a photograph of a stove cooking utensil according to the third embodiment of the present invention taken obliquely from the front. [Figure 20] Figure 20 is a photograph of a kamado cooking utensil taken diagonally from behind. [Figure 21] Figure 21 is a photograph of the stove device taken diagonally from the front. [Figure 22] Figure 22 is a photograph of the stove taken diagonally from behind. [Diagram 23] FIG. 23 is a plan view of a kamado cooking utensil. [Figure 24] FIG. 24 is a photograph of a frame member for manufacturing the stove body. [Diagram 25] FIG. 25 is a cross-sectional view taken along the fire opening of a stove apparatus. [Figure 26] FIG. 26 is a plan view of a stove-top cooking utensil according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] First Embodiment Hereinafter, the kamado cooking utensil 10 will be described with reference to the drawings. For ease of understanding, the left side of Fig. 1 where the fire opening 33 is formed will be referred to as the "front".

[0026] The kamado cooking utensil 10 can be composed of a kamado device 20 and a kettle 50, as shown in Figs.

[0027] First, the kettle 50 will be described. The kettle 50 is a bowl-shaped fireproof container with a bottom 51, and a lid 53 (see FIG. 1) can be attached and detached to the top. The kettle 50 has a generally circular cross section, and can be exemplified by a round kettle curved in an R-shape toward the bottom. It is desirable that the upper edge or side of the kettle 50 is formed with a protruding portion 52, such as a flange or handle, that protrudes toward the outer periphery. This is because when the kettle 50 is placed on the stove device 20, the protruding portion 52 allows for positioning in the height direction.

[0028] The kettle 50 may be a rice cooking kettle with a flange-like protruding portion 52 formed on the upper edge as shown in the figure. This is because the protruding portion 52 is used when positioning the kettle 50 in the stove device 20. The rice cooking kettle may be one used in rice cookers as is. Another example of the kettle 50 is a feathered kettle with a protruding portion formed in the middle. Of course, the kettle 50 may also be a press-molded metal pot, a clay pot, a single-handled pot, a double-handled pot, or the like.

[0029] The kettle 50 is placed on the stove device 20 as shown in Figs. 1 to 6. The stove device 20 has a bottomed, cylindrical stove body 21 with an open top. The stove body 21 includes a cylindrical body 30 and a mouth 40 at the top of the body 30. The stove body 21 can be made to be approximately elliptical in plan view as shown in Fig. 5. The shape of the stove body 21 in Fig. 5 in plan view is approximately elliptical with a slightly reduced diameter at the rear end, specifically approximately teardrop-shaped. The body 30 is disposed at an eccentric position toward the front side with respect to the mouth 40 as shown in Figs. 1, 2, 5, etc.

[0030] As shown in FIG. 6, the body 30 has a bottom 31 and a combustion chamber 32 in which fuel 60 is burned is formed inside. In the illustrated embodiment, the body 30 has a circular cross section. The combustion chamber 32 is formed directly below the kettle 50 and, as shown in FIG. 7, the heat of a flame 61 generated in the combustion chamber 32 can be directly transferred to the kettle 50 (arrow Q1). It is preferable that the diameter of the combustion chamber 32 is approximately the same as or smaller than the diameter of the kettle 50. By making the combustion chamber 32 smaller, it is possible to prevent the dispersion of heat and save fuel 60.

[0031] A fire opening 33, which will be described below, is formed on the front side of the body 30, and connects the combustion chamber 32 to the outside. As shown in Fig. 6, a grate 22 is provided in the combustion chamber 32 at a position slightly away from the bottom surface 31. As shown in Fig. 7, the grate 22 floats the fuel 60 off the bottom surface 31 of the combustion chamber 32 to increase the combustion effect, and also functions as an ash remover that removes the ash of the fuel burned inside. It is preferable that the bottom surface 31 of the combustion chamber 32 is completely closed, but an opening penetrating the bottom surface 31 may be provided in part of it.

[0032] As shown in FIG. 4, the fire opening 33 is an opening that penetrates the front surface of the body 30, and is an inlet for introducing fuel 60 into the combustion chamber 32 from the outside. The fire opening 33 also serves as an air intake port for introducing air into the combustion chamber 32. The fire opening 33 is formed slightly below the body 30, and the lower edge of the fire opening 33 is at a position that is approximately the same as or slightly higher than the grate 22, as shown in FIG. 6. It is desirable that the fire opening 33 is formed to a size that allows the fuel 60, such as newspaper or waste paper, to be rolled up and introduced into the fire opening 33. For example, the fire opening 33 can be set to a height of 4 cm to 6 cm and a width of 8 cm to 12 cm. The fire opening 33 may be configured to be always open. Of course, a metal door like that of a charcoal brazier may be attached to prevent the ash inside from spilling out when the stove device 20 is stored.

[0033] Mouth portion 40 is a peripheral wall 41 that is continuous with the upper portion of body portion 30. Peripheral wall 41 is formed so as to surround an upper space of combustion chamber 32, in which kettle 50 is placed and into which kettle bottom 51 can enter, as well as exhaust passage 45 and exhaust port 44 located rearward of the upper space. In this embodiment, as shown in Figures 1, 2 and 5, upper edge portion 42 of peripheral wall 41 forms a generally teardrop-shaped ellipse.

[0034] The front portion (fire port side) of peripheral wall 41 that surrounds the upper space of combustion chamber 32 is formed with a diameter that allows kettle 50 to enter, i.e., an inner diameter that is approximately the same as or slightly larger than the outer diameter of kettle 50. In addition, the upper edge 43 (exhaust port side) on the rear side of peripheral wall 41 that forms exhaust port 44 bulges outward so as to move away from kettle 50.

[0035] As a specific embodiment, as shown in FIG. 6, the mouth portion 40 is formed with a diameter that allows the pot bottom 51 to enter the furnace body 21.

[0036] To suppress heat outflow, the distance between the peripheral wall 41 and the upper edge 42 of the mouth portion 40 surrounding the front side of the kettle 50 is made as small as possible. For example, taking into consideration differences in thermal expansion and manufacturing errors, it is preferable that the gap S1 (see FIGS. 1, 6, and 7) between the kettle 50 and the peripheral wall 41 and the upper edge 42 is about 3 mm to 10 mm.

[0037] On the other hand, the upper edge 43 of the upper edge 42, which forms the rear edge of the exhaust port 44, is elliptical in shape with a wider gap S2 between it and the kettle 50, as shown in FIG. 1, and the gap between the rear peripheral wall 41 and the kettle 50 is wider, forming an exhaust passage 45. In order to properly exhaust and smoke, the rear peripheral wall 41 and the upper edge 43 of the exhaust port provide an exhaust gap S2 between them and the kettle 50. It is preferable that the exhaust gap S2 is 10 mm to 50 mm, and that about 1 / 4 to 1 / 2 circumference (about 1 / 2 circumference in the figure) of the circumference of the kettle 50 is exposed to the exhaust passage 45. This is to trap heat in the combustion chamber 32 and obtain a chimney effect from the exhaust passage 45 and the exhaust port 44. If the outer diameter of the furnace body 21 and the kettle 50 becomes large and the exhaust port 44 becomes too wide, heat will escape through the exhaust port 44, and the chimney effect may be reduced. For this reason, when the outside diameter of furnace body 21 or kettle 50 is large, it is desirable to form kettle 50 so that about 1 / 4 to 1 / 3 of it is exposed to exhaust passage 45.

[0038] 7, when the kettle 50 is placed on the furnace, the exhaust passage 45 is defined by the rear peripheral surface of the kettle 50 and the rear peripheral wall 41, and serves as a passage connecting the combustion chamber 32 and the exhaust port 44. Since the peripheral surface of the kettle 50 constitutes part of the exhaust passage 45, the heat of the exhaust gas passing through the exhaust passage 45 can also be used to heat the kettle 50. In addition, costs can be reduced compared to when a chimney for exhausting smoke is made from a separate member.

[0039] The body 30 and the mouth 40 can be integrally formed to form the furnace body 21. Of course, the body 30 and the mouth 40 can be made of separate members and mechanically connected, or the mouth 40 can be placed on the body 30 to form the furnace body 21. The body 30 and the mouth 40 can be made of metal, such as clad steel, which is made by joining stainless steel to the surface of carbon steel or low alloy steel. Also, by making the body 30 and the mouth 40 from pottery (including bisque), aluminum die casting, porcelain, etc., a furnace body 21 with excellent heat storage properties can be obtained.

[0040] A support 23 for holding the kettle 50 can be arranged on the upper edge 42 of the peripheral wall 41 of the above configuration, as shown by dotted lines in Figures 4 and 6. The support 23 is arranged on the front side of the furnace body 21 so that the kettle 50 is located at the top of the combustion chamber 32. The support 23 supports and positions the protruding part 52 of the kettle 50 from below, and regulates the height at which the bottom 51 of the kettle penetrates into the furnace body 21. The support 23 can be, for example, a frame made of wire. The support 23 can also be made of a ring-shaped tube, but since heat is trapped, it is preferable to use a frame for cooking rice. In the embodiment shown in the figure, the support 23 is circular in plan view and is configured to stably hold the protruding part 52 of the kettle 50.

[0041] The illustrated kettle 50 is a rice cooking kettle, and is held by the support 23 so that 1 / 3 to 2 / 3 of the total height L (see FIG. 6) of the kettle 50 is inserted into the stove body 21, and the upper 1 / 3 to 2 / 3 is exposed to the outside. This allows convection to occur within the kettle 50, as described below, and allows rice to be cooked well. In the case of a feathered kettle, the support 23 can be omitted.

[0042] The kettle 50 can be made from clad steel, aluminum die-casting, porcelain, etc., and by using clad steel, the heat dispersion efficiency can be increased, allowing the inside of the kettle 50 to be heated evenly.

[0043] Then, as shown in Figures 4 and 6, a grate 22 is placed on the stove body 21 constructed as above, and a support 23 (Figures 4 and 6) is placed on the upper edge 42 to obtain a stove device 20. Food to be cooked, for example rice and water in the case of cooking rice, is placed in the pot 50, and the pot is closed with a lid 53 as shown in Figures 1 and 7.

[0044] Then, kettle 50 is placed with protruding portion 52 placed on support 23. In FIG. 6, kettle 50 is inserted into furnace body 21 from kettle bottom 51 to height L / 2.

[0045] By placing the furnace 50 thereon, an exhaust passage 45 connecting the combustion chamber 32 and the exhaust port 44 is formed by the peripheral surface of the furnace 50 and the peripheral wall 41 on the rear side of the furnace device 20, as shown in FIG.

[0046] Then, as shown in FIG. 7, fuel 60 is put into the fire opening 33 and ignited. The fuel 60 can be rolled up newspapers or waste paper. Newspapers and the like are suitable as the fuel 60 because they are easy to obtain even during disasters. Examples of waste paper include other types of paper such as copy paper and magazines. Also, compared to the case of stockpiling fuel such as firewood or charcoal, newspapers and the like are stockpiled to a certain extent in each household, so the cost for local governments to stockpile fuel in anticipation of a disaster can be reduced. Of course, firewood, charcoal, etc. can also be used as the fuel 60.

[0047] Another advantage of newspapers and the like is that they do not require an ignition agent, are easier to ignite than firewood or charcoal, and do not require high skill to start a fire.

[0048] When the fuel 60 starts to burn in the combustion chamber 32, the kettle 50 is directly heated by the flame 61 (arrow Q1). In addition, due to the generation of heat, new outside air is introduced into the combustion chamber 32 through the fire opening 33 as an air intake (arrow P1).

[0049] The heat (flame 61) generated in the combustion chamber 32 not only directly heats the kettle 50 (Q1) as shown in Fig. 7, but also heats the kettle 50 by radiant heat (Q2) from the stove body 21. Since there is no shield between the kettle 50 and the flame 61, the kettle 50 can be heated with high efficiency.

[0050] In addition, some of the heat generated within the stove body 21 rises between the front peripheral wall 41 and the kettle 50 as shown by arrow P2, but since the gap S1 between the front peripheral wall 41 and the kettle 50 is narrow, the heat becomes trapped within the stove body 21 and is difficult to escape, so that the kettle 50 is heated with high efficiency.

[0051] Smoke generated in the combustion chamber 32 passes through the exhaust passage 45 on the rear side of the stove device 20 and is discharged to the outside from the exhaust port 44 (P3). At this time, fresh outside air is introduced into the combustion chamber 32 from the fire opening 33 due to the chimney effect (P1). Therefore, even without fanning the fire with a fan or the like, the fire is unlikely to go out and the combustion continues, and scattering of ashes is also suppressed.

[0052] Heated air flow P3 to be released to the outside passes through exhaust passage 45 formed by the peripheral surface of kettle 50 and rear peripheral wall 41. Since kettle bottom 51 is located lower than exhaust port 44, heat outflow is suppressed and air flow P3 can be used to efficiently receive heat.

[0053] As described above, the pot 50 is appropriately heated, so cooking can be done with a small amount of fuel in a short time.

[0054] In addition, since newspapers and waste paper have less fuel energy than firewood and charcoal, they need to be frequently thrown into the fire opening 33. The amount and timing of throwing in newspapers and waste paper can be adjusted according to their thickness and size.

[0055] In the present invention, since the grate 22 is disposed in the combustion chamber 32, the ash generated by combustion falls from the grate 22 and separates on the bottom surface 31 side of the combustion chamber 32. This prevents the ash from impeding the air flow, and stabilizes the combustion. In addition, by separating the ash, scattering of the ash from the exhaust port 44 can be suppressed.

[0056] In the case of a rice cooking pot with a flange-like protrusion 52 on the upper edge (pot 50 shown in the figure is a rice cooking pot), the upper side of pot 50 can be exposed from stove body 21 by placing protrusion 52 on support 23. This allows the upper part of pot 50 to dissipate heat, so a temperature difference occurs between the top and bottom of pot 50 relative to the heated pot bottom 51, which favorably generates convection and suppresses the force of boiling. This allows delicious cooking of rice without overflow.

[0057] When cooking (rice cooking) is completed, it is sufficient to stop feeding fuel 60. If you want to keep the food warm, you can periodically feed in newspapers or the like.

[0058] Cooking is not limited to cooking rice, but may also include boiling water or stewing.

[0059] <Second embodiment> The second embodiment of the present invention will be described below. In this embodiment and the following third embodiment, unless otherwise specified, the members with the same names and symbols as those in the first embodiment mean the same or substantially the same members, and the description thereof, including the method of use, will be omitted as appropriate.

[0060] 8 to 18 show a stove cooking utensil 10 according to a second embodiment of the present invention. As shown in Figs. 8 to 10, the stove cooking utensil 10 includes a stove device 20 (stove body 21), a kettle 50, a cover 53, and a support 23 for placing the kettle 50 on the stove device 20, as in the first embodiment. In the second embodiment, the stove cooking utensil 10 has a stove device 20 that is circular in plan view and a kettle 50 that is also circular in plan view eccentrically disposed on the front side, so that an exhaust passage 45 and an exhaust port 44 are formed on the rear side. As a result, as shown in Fig. 12, a gap S2 between the kettle 50 that forms the exhaust port 44 and the upper edge 42 of the stove body 21 that surrounds the rear side of the kettle 50 is wider than a gap S1 on the front side of the kettle 50.

[0061] As shown in Fig. 10, kettle 50 is a rice cooker with a flange-shaped protrusion 52 on the upper edge. Also, as shown in Figs. 11 to 13, lid 53 has a larger diameter than kettle 50, has knob 53a on the upper surface, and has anti-slip device 53b on the lower surface that abuts against protrusion 52 of kettle 50 from the inside.

[0062] As best seen in Fig. 10, the stove device 20 is mainly composed of a stove body 21 having a cylindrical body 30 and a bottom surface 31, with a circular upper edge 42. As shown in Figs. 12 and 13, the body 30 has a necking portion 30a in which the inner surface is narrowed by necking processing near the upper edge 42. This necking portion 30a serves to direct the flame and hot air emitted upward from the stove body 21 inward and transmit it to the kettle 50. In addition, a ring-shaped support holder 42a on which the support 23 is placed is recessed in the upper edge 42 of the stove body 21, as shown in the cross-sectional view 12 and other figures.

[0063] As shown in Figures 8 to 10, 14, and 15, a fire opening 33 is opened downward on the front of the stove body 21. In the figure, two fire openings 33 are formed, and these fire openings 33 are formed side by side on the left and right on the front of the stove body 21. As shown in Figure 14, the fire openings 33 are formed at a position higher than the grate 22 and lower than the bottom surface 51 of the kettle 50 on which they are placed.

[0064] Each fire opening 33 can be set to a height of 4 cm to 6 cm and a width of 8 cm to 12 cm, as in the first embodiment. When two fire openings 33 are formed, the distance between the fire openings 33 varies depending on the diameter of the furnace body 21, but is preferably about 2 cm to 10 cm. As shown in FIG. 15, it is desirable to form the fire openings 33 so that the intersection angle I of the center line C connecting each center with the center of the furnace body 21 is about 30 degrees to 150 degrees. This is because if the intersection angle I becomes large (for example, close to 160 degrees to 180 degrees), there is a risk that the fuel 60 charged from one fire opening 33 will fly out of the other fire opening 33, or the fuel 60 charged from one fire opening 33 will push the fuel 60 burning in the combustion chamber 32 out of the other fire opening 33. In addition, when three or more fire openings 33 are formed, it is desirable to set the intersection angle I of the center lines C of the fire openings 33 located on the outer sides to be 30 degrees to 150 degrees, as shown in Figure 25 described later.

[0065] A grate 22 is placed in the stove body 21. The grate 22 can be in a vertical lattice shape, a mesh shape, a horizontal lattice shape, or a surface lattice shape as shown in FIG. 15 in order to drop the burned ash to the bottom of the stove body 21. It is desirable to position the grate 22 in the stove body 21. For example, as shown in FIG. 12, the stove body 21 has a positioning hole 21a on the bottom surface 31, and the grate 22 has a hook piece 22a protruding therefrom. With this, when attaching the grate 22 to the stove body 21, the grate 22 can be positioned by inserting the hook piece 22a into the positioning hole 21a, and when the restraining wall 24 described below is provided on the grate 22, the grate 22 can be attached in the correct front-to-back direction. Note that instead of the grate 22, protrusions may be provided on the bottom surface 31 of the stove body 21 to form an uneven shape, and the ash may be dropped between the protrusions.

[0066] The stove cooking utensil 10 of this embodiment is configured such that the kettle 50 is eccentrically disposed on the front side of the stove device 20. Therefore, in order to efficiently burn the newspaper as the fuel 60 and heat the kettle 50, the stove body 21 needs to burn the fuel 60 directly below the kettle 50 on the front side of the stove body 21 and secure an exhaust passage 45 on the rear side. For this reason, as shown in Figs. 12 to 15, the grate 22 is provided with a suppression wall 24 on the rear side to prevent the movement of the fuel 60. The suppression wall 24 can be 2 cm to 6 cm in height. It is preferable to form the suppression wall 24 on the grate 22 because this reduces the number of parts and makes maintenance easier, but it may be a separate member from the grate 22.

[0067] A kettle 50 is placed on the stove device 20. In this embodiment, since the stove device 20 and the kettle 50 are both circular, as shown in Figs. 8, 9, 11, 12, etc., the kettle 50 is eccentrically disposed on the front side of the stove device 20, and the rear side is the exhaust passage 45 and the exhaust port 44. To enable such an arrangement, the support 23 is configured such that the upper frame 23b forming the upper edge is eccentric with respect to the lower frame 23a forming the lower edge, as shown in Fig. 10. More specifically, the lower frame 23a is configured from a metal wire having an annular shape that fits into the support receiver 42a of the upper edge portion 42 of the stove body 21. The upper frame 23b can be configured by forming a metal wire into an annular shape, and connecting the upper frame 23b with the lower frame 23a so that the upper frame 23b is eccentric with respect to the lower frame 23a. In this embodiment, as shown in FIG. 10, the upper frame 23b is an arc-shaped kettle support part 23c, and is composed of a connecting piece 23d whose both ends are bent downward and reach the lower frame 23a. For reinforcement, the kettle support part 23c and the lower frame 23a are connected by a reinforcing piece 23e. When the support 23 is attached to the stove body 21, the kettle support part 23c is positioned at the front and rear, respectively, so that no frame is provided on the left and right sides that contact the kettle 50. This prevents the user from lifting the kettle 50 together with the support 23 when he or she grasps the left and right protrusions 52 of the kettle 50 and lifts it, because the user's fingers do not hook on the frame.

[0068] As described above, the upper frame 23b of the support 23 is offset forward relative to the lower frame 23a, so the support 23 has a front and rear mounting orientation. In order to prevent the front and rear orientation of the support 23 from being confused, as shown in FIG. 12, a positioning protrusion 23f is provided on the lower frame 23a of the support 23, and a positioning recess 42b into which the positioning protrusion 23f fits is provided on the support receiver 42a of the stove body 21, as shown in FIGS. 10 and 12. The positioning protrusion 23f can be formed, for example, by having the lower end of the rear reinforcing piece 23e protrude downward beyond the lower frame 23a. This allows the support 23 to be mounted on the stove body 21 in the correct orientation.

[0069] The cooking stove 10 is made from the above-mentioned components. First, as shown in Figures 12 to 15, the grate 22 is placed inside the stove body 21 having the above-mentioned configuration. As shown in Figure 12, the grate 22 can be positioned without misalignment by inserting the hook piece 22a into the positioning hole 21a, and can be attached in the correct direction.

[0070] Next, the support 23 is attached to the stove body 21. As shown in Fig. 12, the support 23 can be attached with the correct orientation in the front-rear direction by fitting the positioning protrusion 23f into the positioning recess 42b.

[0071] Then, the food to be cooked is placed in the support 23, and the kettle 50 with the lid 53 attached is placed on it. The kettle 50 is placed so that the protruding portion 52 abuts the upper frame 23b. As shown in Fig. 10, the upper frame 23b of the support 23 has the kettle support portions 23c arranged at the front and rear, so that the user can place the kettle 50 so that the fingers holding the kettle 50 are positioned on the left and right sides of the stove body 21, thereby allowing the user to place the kettle 50 without getting their fingers pinched.

[0072] As shown in Figures 8, 9, 12, etc., it can be seen that the kettle 50 is disposed eccentrically forward with respect to the furnace body 21. The furnace body 21 directly below the kettle 50, i.e., the portion forward of the suppression wall 24, forms the combustion chamber 32, and the gap S2 formed between the kettle 50 and the body part 30 of the furnace body 21 and the portion rearward of the kettle 50 forms the exhaust passage 45. The upper end of the exhaust passage 45 forms the exhaust port 44.

[0073] Then, as shown in FIG. 16, fuel 60 is put in through the fire opening 33 and ignited. In the second embodiment, since two fire openings 33 are provided, the first fuel 60 is put in through one of the fire openings 33 as shown by reference numeral 1 in FIG. 15. The fuel 60 is, for example, rolled up newspaper. By providing the suppression wall 24 in the combustion chamber 32, as shown in FIG. 16, the burning fuel 60 can be prevented from passing through the combustion chamber 32 and moving to the lower side of the exhaust passage 45 or the exhaust opening 44. This allows the fuel 60 to be kept in the combustion chamber 32, and the flame 61 can be efficiently used for heating Q1 of the kettle 50.

[0074] After the first fuel 60 is charged, the subsequent fuel 60 is charged from the other fire opening 33 as shown by reference number 2 in FIG. 15. The subsequent fuel 60 is charged alternately into the two fire openings 33 (reference numbers 3, 4, 5, ...). By charging the fuel 60 from one fire opening 33 before the fuel 60 charged from the other fire opening 33 is burned, it is possible to prevent a decrease in the calorific value. In addition, by charging the fuel 60 alternately from the multiple fire openings 33, it is possible to prevent the charging of the fuel 60 in a way that pushes the burning fuel 60 to the back, and also to solve the problem that the burning fuel 60 gets in the way and prevents new fuel 60 from being charged. This allows the fuel 60 to be burned efficiently in the combustion chamber 32.

[0075] When the fuel 60 begins to burn in the combustion chamber 32, as shown in Figure 16, the kettle 50 is directly heated by the flame 61 (arrow Q1), and as a result of the generation of heat, new outside air is introduced into the combustion chamber 32 through the fire openings 33, 33 as air intakes (arrow P1).

[0076] The heat (flame 61) generated in the combustion chamber 32 not only directly heats the kettle 50 Q1, but also heats the kettle 50 by radiant heat (Q2) from the furnace body 21. Since there is no shield between the kettle 50 and the flame 61, the kettle 50 can be heated with high efficiency. In this embodiment, the upper edge of the body 30 of the furnace body 21 is narrowed by the necking process 30a, so that the flame and hot air P2 emitted upward from the furnace body 21 flows toward the kettle 50 along the inner surface of the narrowed body 30, and can apply heat to the kettle 50 more effectively.

[0077] As described above, the pot 50 is appropriately heated, so cooking can be done with a small amount of fuel in a short time.

[0078] At high temperatures, the newspaper that serves as the fuel 60 burns out in one and a half to two minutes. For this reason, in order to obtain high heat, it is necessary to feed the fuel 60 at one-minute intervals (see the examples). If the fuel 60 is continuously fed into the same fire hole 33, the fuel 60 that was fed in earlier and has not yet burned completely is pushed backward, which may reduce the combustion efficiency. However, in this embodiment, there are two fire holes 33, and the fuel 60 can be fed into the fire holes 33 alternately, as shown by the reference characters 1, 2, ... in FIG. 15. Therefore, the fuel 60 that was fed in earlier is not pushed in, and the fuel 60 can be burned with high efficiency.

[0079] As described above and shown in FIG. 16, the fire opening 33 is formed at a position lower than the bottom surface 51 of the kettle 50 on which it is placed. However, if the bottom surface 51 of the kettle 50 is formed at a height that overlaps with the fire opening 33, the newspaper may hit the bottom surface 51 of the kettle 50. Also, when a large amount of newspapers, which are fuel 60, are thrown in through the fire opening 33, the newspapers may hit the bottom surface 51 of the kettle 50. In this way, when the newspapers hit the bottom surface 51 of the kettle 50, the newspapers do not burn partially and unburned remains are generated. The generation of unburned remains leads to a decrease in combustion efficiency and the generation of smoke. In particular, when the completion of cooking is managed by the number of newspapers used, the generation of unburned remains creates a state in which cooking is not completed even after the introduction of newspapers is completed. Furthermore, FIG. 17 shows a state in which the kettle 50 is removed from the cooking utensil 10 while unburned remains are being generated, but when the kettle 50 is removed, the unburned newspapers (fuel 60) may ignite due to the embers. For this reason, it is desirable to form the fire opening 33 at a position lower than the bottom surface 51 of the kettle 50 on which it is placed, and not to put in a large amount of newspaper at once, but to add it after combustion has progressed to a certain extent.

[0080] Fig. 18 shows the cooking utensil 10 after use. In this embodiment, the outer diameter of the kettle 50 is smaller than the inner diameter of the stove body 21, so the support 23 is inserted upside down into the stove body 21, and the kettle 50 and the lid 53 are placed on top of it, allowing the cooking utensil 10 to be stored compactly as shown in Fig. 18.

[0081] <Third embodiment> 19 and 20 are photographs showing the stove cooking utensil 10 of the third embodiment viewed from an oblique direction. In the third embodiment, the stove device 20 is produced by forming the body 30 of the stove body 21 with cement 26 in an aluminum cylinder 25.

[0082] The furnace body 21 has a combustion chamber 32 with a circumferential surface made of cement in the center as shown in Figs. 21 and 22. The upper edge 42 of the furnace body 21 has a semicircular shape on the front side that follows the circumferential surface of the kettle 50 (dash line 50a) as shown in plan view 23, and extends rearward from both edges of the semicircular shape, opening in a closed arc along the circumferential surface of the cylindrical pot 25. The exhaust port 44 is a space formed in a gap S2 between the rear surface of the kettle 50 and an upper edge 43 of the exhaust port that is arc-shaped and follows the circumferential surface of the cylindrical pot 25. This gap S2 is formed wider than the gap S1 between the front surface of the kettle 50 and the upper edge 42 of the arc-shaped shape.

[0083] As shown in Figs. 21 and 22, the body portion 30 has a necking portion 30a where the upper edge portion 42 is reduced in diameter.

[0084] In addition, the stove body 21 has three fire openings 33 at the front.

[0085] The stove body 21 with the above configuration can be made in the following manner. First, three holes that will become the fire opening 33 are opened on the front of the cylinder 25 using a hole saw or the like. Next, as shown in FIG. 24, a urethane frame 70 is made that is wound into a cylindrical shape to have the shape of the combustion chamber 32 and the upper edge 42, and the urethane frame 70 is placed in the aluminum cylinder 25. As shown in the figure, the urethane frame 70 has a reduced diameter frame 71 with a small diameter on the upper side so that the upper edge 42 is reduced in diameter, and an arc-shaped frame member 72 is attached at a position corresponding to the exhaust port. The cylinder 73 in the frames 70, 71 in FIG. 24 is for preventing the urethane from losing its shape. Three cylindrical urethane frames 74 are inserted into the fire opening 33. Then, cement is poured into the formwork formed by the cylinder 25 and the urethane frame 70, and after the cement hardens, the urethane frames 70, 74 can be removed. By using the frames 70, 71, the necked body 30 can be easily made.

[0086] In the manufactured stove device 20, a grate 22 is placed as shown in FIG. 21, a support 23 is placed on it, and then a kettle 50 is placed on it (FIGS. 19 and 20).

[0087] In this embodiment, the kettle 50 has a resin handle 52a attached to the outer periphery of the flange-like protrusion 52. The resin handle 52a may burn or scorch if it comes into direct contact with the flame. For this reason, the kettle 50 is placed so that the handle 52a is located on the left and right outside the upper edge 42 as shown in Figs. 20 and 23, so that the handle 52a is not directly exposed to the flame and is not exposed to hot air. With reference to Fig. 23, it can be seen that the protrusion 52 of the kettle 50 protrudes outside the upper edge 42 of the stove body 21, and the handle 52a is located even further out.

[0088] Then, newspapers as fuel 60 are put into the fire opening 33. In this embodiment, since there are three fire openings 33, the fuel 60 can be put into the fire openings 33 in the order of the right side, center, and left side at predetermined intervals (for example, one minute). Also, as shown in FIG. 25, the fuel 60 can be put into the center fire opening 33 first (reference number 1), then the fuel 60 can be put into the left and right fire openings 33 simultaneously (reference number 2), and then the fuel 60 can be put into the center (reference number 3), the left and right fire openings 33 again (reference number 4) in that order. By putting the fuel 60 into the left and right fire openings 33 simultaneously, twice the amount of fuel 60 can be put into the combustion chamber 32 at the same time, so the firepower can be increased. This method is particularly effective when the size of the kettle 50 is large (10 go in this embodiment).

[0089] When fuel 60 is added, kettle 50 heats up in the same manner as in the first and second embodiments. Kettle 50 has a resin handle 52a, but as shown in Fig. 23, the gap between the left and right sides of upper edge 42 of kettle 50 and furnace body 21 is very narrow, and handle 52a protrudes to the left and right. This prevents handle 52a from being heated by the flames and prevents it from burning.

[0090] In this embodiment, the trunk 30 of the stove main body 21 is made of cement 26 using urethane frames 70, 71, etc. This has the advantage that it can be made by a DIY person, even if one is not a specialized processing company, and that by changing the size of the frames 70, 71, etc., a stove device 20 can be made to fit the kettle 50 owned.

[0091] <Fourth embodiment> FIG. 26 shows a stove cooking utensil 10 according to a fourth embodiment of the present invention. The stove cooking utensil 10 according to the fourth embodiment is a stove cooking utensil 10 in which a kettle 50 having a circular outer diameter is placed on a stove body 21 having a circular inner diameter as in the second embodiment, but the size of the kettle 50 is larger (the kettle 50 in the second embodiment can cook 5 go of rice, and the kettle 50 in the fourth embodiment can cook 10 go of rice). When the size of the kettle 50 is larger, the inner diameter of the stove body 21 must also be larger in order to ensure the exhaust port 44. With a circular stove body 21 and kettle 50, by increasing the inner diameter of the stove body 21, a large crescent-shaped exhaust port is formed between the stove body 21 and the kettle 50.

[0092] When cooking rice in a stove with this large crescent-shaped exhaust port, the rice in the center of the pot could be cooked, but the rice on the left and right sides could not be cooked and turned into porridge. When the cause of this uneven cooking was investigated, it was found that the airflow from the combustion chamber to the exhaust port was concentrated near the center, where the opening width of the crescent-shaped exhaust port was the widest, and as a result, the flame and heat to the pot were also concentrated near the center, and the left and right sides of the pot were not heated sufficiently.

[0093] Therefore, in this embodiment, as shown in Fig. 26, a branch wall 43a that divides the exhaust port 44 protrudes from the center of the exhaust port upper edge 43. The branch wall 43a is configured to extend inward toward the peripheral surface 50a of the kettle 50 on which it is placed, and its tip is formed in an arc shape that fits along the peripheral surface 50a of the kettle 50. Note that the stove body 21 can be formed by hardening cement 26 in a cylinder 25 using a frame, as in the third embodiment.

[0094] With the kettle 50 placed on the stove body 21, the exhaust port 44 is divided into left and right exhaust ports 44a, 44a by the branch wall 43a. That is, the large crescent-shaped exhaust port becomes two exhaust ports 44a, 44a separated into left and right. When fuel 60 is put into the stove cooking utensil 10 with this configuration from the fire opening 33 (see the third embodiment), the general flow of air passing from the fire opening 33 through the combustion chamber 32 toward the exhaust ports 44a, 44a during cooking is as shown by the arrows R1 and R2 in a plan view in FIG. 26. Specifically, the air flow R1 from the central fire opening 33 passes directly under the kettle 50, branches to the left and right, and is exhausted from the exhaust ports 44a, 44a. In addition, the air flow R2 from each of the left and right fire openings 33 passes below the left and right of the kettle 50 and is exhausted from the left and right fire openings 33, respectively. The passage of the airflows R1 and R2 is also the passage of the flame, so that the airflow R branches toward the exhaust ports 44a, 44a, so that the heat to the kettle 50 is distributed evenly without concentrating in the center, and the kettle 50 is heated almost uniformly. As a result, uneven cooking can be prevented even when a large-sized kettle 50 is used.

[0095] Instead of forming the branch wall 43a directly on the upper edge 43 of the exhaust port as shown in FIG. 26, a plate-like member, a block, a brick, or the like may be placed on the upper edge 43 of the exhaust port to block the center of the exhaust port 44. EXAMPLES

[0096] The cooking utensil 10 of the first embodiment shown in Fig. 1 was manufactured, and rice was cooked. A 5-go rice cooker used in an electric rice cooker was used as the kettle 50. Three go of rice was placed in the kettle 50 together with water, and the lid 53 was placed thereon.

[0097] Newspapers (each sheet cut in half) were used as fuel. Each sheet was pushed into a toilet paper roll and rolled up, then removed from the roll to form a lump.

[0098] The kettle 50 was placed on the stove device 20, and a lump of newspaper was first put into the fire opening 33 to ignite the fire. Ignition could be easily achieved with a match or a lighter.

[0099] Since it is preferable to heat the rice over low heat at first, after adding the first sheet of newspaper, a total of five sheets were added into the fire hole 33, one at a time, every two minutes.

[0100] Next, to cook the rice, ten blocks of newspaper were added into the cooking port 33, one every minute.

[0101] After putting the tenth block of newspapers into the cooking opening 33, it was left for 15 minutes to steam, and when the lid 53 was opened, the rice cooking was completed.

[0102] The rice was cooked over an open flame, but it was not burnt and was delicious. To keep the rice warm, you can add a block of newspaper to the fire hole 33 and light it every 30 minutes.

[0103] As described above, with the stove device 20 and stove cooking tool 10 of the present invention, it is possible to cook 3 cups of rice with just 15 sheets of newspaper, thus enabling fuel saving. For 2 cups of rice, 13 sheets of newspaper are needed, and for 4 cups of rice, 17 sheets of newspaper are needed.

[0104] The reason why the stove device 20 of the present invention was able to cook rice well even with a small amount of poor fuel 60 such as newspaper is that heat was trapped in the front side (fire opening side) of the stove device 20 and was difficult to escape (arrow P2 in Fig. 7), so the kettle 50 was heated with high efficiency, the kettle 50 was heated by the heated air flow P3 passing through the exhaust passage 45 because part of the exhaust passage 45 was composed of the kettle 50, and further, the bottom 51 of the kettle was located lower than the exhaust port 44, so heat outflow was suppressed. In addition, in the case of firewood, even 10% of the generated heat energy is not used for cooking rice, but in the stove cooking utensil 10 of the present invention, about 90% of the heat energy of the newspaper lump can be used to heat the kettle 50, and it is considered that rice was cooked with a small amount of newspaper lump.

[0105] Another advantage of using newspaper as fuel 60 is that it is more readily available than firewood. Also, newspaper does not require the same fire-starting skills or ignition agent as firewood. Furthermore, it is easy to adjust the heat of the newspaper. In the above embodiment, newspaper is used as an example, but other papers such as copy paper and magazines can also be used. In that case, the same rice cooking can be achieved by adjusting the amount and timing of the paper depending on its thickness and size.

[0106] As described above, the cooking utensil 10 of the present invention can cook rice using a small amount of newspaper and is suitable as a cooking utensil for cooking during disasters, camping, etc.

[0107] The above description is for the purpose of explaining the present invention, and should not be interpreted as limiting the invention described in the claims or restricting the scope of the invention. Furthermore, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications are possible within the technical scope described in the claims.

[0108] For example, the thickness, size, width, etc. of each member are merely examples and are not limited to the above embodiment. In addition, it should be understood that the expressions such as circle and ellipse regarding the shape of the stove body 21 and the kettle 50 include not only perfect circle and perfect ellipse, but also shapes such as substantially circle, ellipse, approximately circle, approximately ellipse, etc. [Explanation of symbols]

[0109] 10. Kamado Cooking Utensils 20. Furnace equipment 21. Furnace body 23 Supports 30 Body 32 Combustion chamber 33 Fireplace 40 Mouth 41 Peripheral wall 42 Upper edge 43 Exhaust port upper edge 44 Exhaust port 45 Exhaust passage 50 Kettle 51 Bottom of pot 52 Protrusion 60 fuel S1 Gap S2 Exhaust gap

Claims

1. A furnace device in which a furnace opening, which also serves as an air intake port, is opened through the front of a cylindrical furnace body with a bottom, which serves as a combustion chamber for burning fuel, and a pot can be placed above the combustion chamber, The fire openings are opened in plurality on the front side of the stove body and above the bottom surface, Furnace device.

2. The plurality of fire openings have a center line C connecting the centers of the two outer fire openings and the center of the stove body, with an intersection angle I of 30 degrees to 150 degrees.

2. The furnace device according to claim 1.

3. The stove body has a grate that floats fuel from the bottom surface.

2. The furnace device according to claim 1.

4. The grate has a suppression wall that prevents the fuel introduced from the fire hole from moving rearward.

4. The furnace device according to claim 3.

5. A cooking stove comprising the cooking stove device according to any one of claims 1 to 4 and the pot disposed therein.

6. The kettle is formed with an outer diameter smaller than the upper edge of the stove body, The furnace device has a lid body with a diameter larger than that of the kettle, The kettle is stored in the stove body, and the lid is placed on the kettle. The stove cooking implement according to claim 5.

7. The kettle has a protrusion formed on the outer periphery of the upper edge or side surface, The furnace device has a support including a lower frame supported on the upper edge portion of the furnace body, and an upper frame having a smaller diameter than the lower frame and supporting a protruding portion of the kettle from below, The support is inserted upside down into the stove body, and the kettle and the lid are placed on top of the support to be stored. The stove cooking utensil according to claim 6.

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